Record shaving machine



Oct. 12, 1937.

C. HUENLICH RECORD SHAVING MACHINE Filed Feb. 20, 1937 2 Sheets-Sheet l32 /N VENTO/e 3 Cha-des Huenlc'h A TTORNEY Oct. 12, 1937. c. HUENLicHRECORD SHAVING MACHINE 2 Sheets-Sheet. 2

Filed Feb. 20, 1937 SUPPLY LIN E /N VEA/TOR Char/es Huen I ich BYava-La,

ATTORNEY Patented Oct. 12, 1937 UNITED sms T GFFICE RECORD SHAVHNGMACHINE 4 Charles Huenlich, Bloomfield, N. J., assignor to Thomas A.Edison, Incorporated, West Orange, N. J., a corporation of New JerseyThis invention relates to machines for shaving sound records, and moreparticularly to the control of the record-engaging tool for perform- Ying the shaving operation.

Sound record cylinders are made of wax-like material and When used inconnection with business phonographs, it is customary, after dictatedmaterial has been recorded on the cylinder and the record transcribed,to resurface the cylinder by shaving olf the outer surface portionthereof so as to prepare it for receiving a new record thereon. Such acylinder is commonly referred to asV a used7 record, but it is alsocustomary to shave off the outer surface portion of a new cylinder toprovide the same with a smooth properly prepared surface to be recordedupon. Therefore, the term record as used herein connotes a wax or othertablet having a surface either adapted to receive and bear or alreadybearing a sound track.

The resurfacing operation requires a shaving knife mounted on a carriageand adapted to transverse a rotatably mounted record cylinder and to beheld in operative relation with respect thereto. Means are provided forsetting the knife Within xed limits so that it will take a cut ofdesired depth as the cylinder is rotated. Toi avoid injury to thecylinder as well as the knife, the knife setting operation should beperformed when the cylinder is not rotating. It is therefore essentialto stop the rotation of the cylinder whenever the knife is adjusted tooperative position with respect to the record, or whenever it is desiredtorremove the cylinder form the machine.

It is an `Object of the present invention to provide in a recordresurfacing machine, means for automatically releasing' therecord-engaging tool from its adjusted position as an incident tostopping the rotation of the cylinder.

Another object of the invention is to provide means whereby theautomatic release of the record engaging tool may be effected at anygiven point of travel when operatively positioned with respect to thecylinder.v

A further object of the invention is the provision of a switchingmechanism which electrically controls the operation of a motor forrotating the cylinder support and mechanically restores the shavingknife to its inoperative or unset position, said functions beingincidental to each other.

Other objects and structural features of the invention will behereinafter more fully described and claimed.

I have illustrated an embodiment of my invention in the accompanyingdrawings which form a part of the specication. Referring to thedrawings: f Y

Figure 1 is a plan view of a conventional form of record resurfacingmachine to which my invention has been applied;

Figure 2 is a right-hand end view of the machine of Figure 1, a portionof the cabinet being shown in section;

Figure 3 is a cross sectional View taken along the line 3 3 of Figure 1;

Figure 4 is a cross sectional View taken along the line 4 4 of Figure 1;

Figure 5 is a cross sectional View taken along the line 5 5 of Figure 2,showing particularly the mounting and means for retaining the adjustmentof the resurfacing tool;

Figure 6 is a fragmentary view showing a `modification of the invention;and

Figure 7 is a cross sectional view taken along the line T 'l of Figure6.

With reference to Figures 1 and 2, it will be seen a base plate l ismounted on the cabinet 2 of a shaving machine. On the base I there isprovided left-hand standards 3 and 4, righthand standards 5 and 6, andcentral standard 1. A conically-pointed stud 8 is provided in thestandard t for engaging a recess in the left end of a mandrel shaft 9,thus providing a thrust bearing for said shaft end. The shaft 9 passesthrough an oversize hole lil in the standard l and a collar il securedthereon prevents the shaft from being completely disengaged from stud 8.The shaft 9 comprises a portion of the mandrel I2, onto 'whichl may beslid asound record cylinder A into frictional engagement with saidmandrel, by virtue of both the mandrel l2 and the bore of the record A,being oomplementarily tapered. 'I'hus far described, it will beappreciated ythat the mandrel is retained in an approximate positiononly, the oversized hole l and collar H falling to provide the definiteaXial alignment which is imperative during the resurfacing operation.Therefore, to maintain proper axial alignment of the mandrel duringrotation, a sup.- porting means is provided which is removablyassociated with and adapted to engage the free end of the mandrel, Thisincludes the swinging end-gate l5 carrying an adjustable conical stud itadapted to engage a recess in the adjacent end of the mandrel l2. Thegate l5 is pivoted to a boss il formed on the base plate l, and isclosed, as illustrated in Figure 1, by clockwise rotation about itspivot until its forward ex- Cil tremity impinges against the right-handextremity of the front guide rail I8. More specifically, this pivotingmeans comprises the post 20 extending from the boss i 'I as shown inFigure 4; said post being adapted to serve as a journal for the gate andto support an inverted cup 2li withn in which is provided a strongtorsion spring 2I normally urging said gate counterclockwise or awayfrom the position shown. With the gate adjusted to closed positionmandrel I2 is wholly supported by the studs 8 and i 6, the latterprovidfV ing axial alignment and also preventing appreciable end playthereof. To retain the gate in closed position there is provided a latch25, which is pivotally secured by means of a. long shank 21 t a verticalpost 26 swivelling iniguide rail 58; the shank 2'I swings in ahorizontal lslot 28 in the rail I8. The most rearward contemplatedadjustment of this latch is that illustrated in Figure l, wherein itsshank 2l protrudes through a slot l in the forward extremity of the gatel5. The latch 25 retains this adjustment, until deliberately moved, byvirtue of a spring-catch member 29, which, as is well known in the art,surrounds the shank 2l" and is normally urged toward the pin 25 by aninternal spring (notv shown) disposed about said shank. The process ofdisengaging the right end support from the mandrel consists in pullingforward on the knob 25' of latch 25, whereupon the catch member 29,compressing its spring, moves slightly toward the knob 25' and permitsthe latch to swing about its pivot 26 to a more clockwise adjustment,dis-V engaging the gate I5; the latter is thereupon swung in acounterclockwise direction to an open position. The reverse process ofengaging the right end support with the mandrel consists in firstadjusting the gate to a closed position and then moving the latch 25 tothe illustrated gateengaging position.

When the right end support for the mandrel I2 is o-peratively positionedas above described, said mandrel is in turn parallel relation with theguide rail I8 and thus the record may be rotated for resurfacing. In theillustration of Figure 3, the driving means includes a motor M mountedwithin the cabinet 2 and having a driving pulley m adapted to drive, bymeans of the belt 22, a pulley 23 carried by the mandrel shaft 9; therebeing provided in the base plate I a suitable slot 2li permitting thefree passage of the belt 22 from motor M to the pulley 23.

The resurfacing machine illustrated is adapted to shave a thin layerfrom the outer surface of the cylinder by means of a record-engagingtool illustrated herein as a knife Se. rlrhe knife 3B is secured to theend of a bar SI, which is adjustably mounted in a boss 32' formed uponthe movable arm 32 which latter is sometimes hereinafter called the toolcarriage. This carriage is slidably and partiallyrotatably mounted onthe carriage rod 35, the latter being disposed behind and parallel tothe mandrel I2 and terminally secured to the standards 3 and 5. lThearrn 32 is approximately semicircular in side elevation, and is providedwith a smooth flat surface 33 at its forward extremity. A weight 35i,formed integrally with the arm` 32, provides a convenient handlepiecenormally maintaining the surface 33 in contact with the top surface ofthe front guide rail I8. The knife may be so adjusted that when the arm32 is in the position illustrated by Figure 2, the knife will engage thesurface of the record A to the desired depth. Whether or not the knife30 is adjusted, the arm 52 may always be lifted to rotate the entireassembly including said knife and parts connected thereto in a clockwisedirection, thereby disengaging the knife from the surface of the recordif said knife be in set position.

The carriage, including its associated parts such as the knife 3G, isdesigned to traverse the record surface during rotation thereof. To thisend there is provided a feed screw 35 parallel to carriage rod 35 andjournaled in standards fr and 6. The feed screw 35 is rotated duringmandrel rotation by a belt 3'! engaging pulley 38 carried by said screwand a driving pulley 29 carried by the mandrel shaft 9. A feed nut 4D isarranged to engage the feed screw when the arm 32 occupies its normalresting position on the guide rail I8, and to disengage the same whenthe arm 32 is lifted; said feed nut is secured to the carriage 32through the medium of a slightly resilient extension li! carried by theportion formed on said carriage. It will therefore be understood thatwhen the knife Sil is in a set or cutting position and the mandrel I2 isrotated, the carriage 32 and hence the knife 353 will move steadily in alongitudinal direction of the cylinder from right to left, thus taking auniform cut from the outer portion of the record surface. For confiningthe shavings from the record surface there is provided a chip deector 42carried by the knife bar SI, and a chip chute @2' for directing thechips` into a suitable receptacle (not shown) within the cabinet 2.

The construction described above is generally known to the art; it isalso conventional to provide an electrical switch for controlling themandrel rotating means. Such a switch, indicated by the referencecharacter |45, may be of the well known commercial type wherein a springactuated toggle lever system is controlled by an outwardly extending armI@ movable to an On and an Off position to close and open, respectively,an electric circuit. Such a circuit is shown in Figure 3 which seriallyincludes the motor M and any suitable source of electrical powertherefor, such for example as the schematically illustrated supply lineterminals IM. Associated with the switch are indicia which may becarried upon the side wings M6 of the lever |436 (see Figure 4) forindicating its operated position. In the present embodiment I mount theswitch |45, by means of the screws U', below the top of the cabinet 2 ata point adjacent to the right-hand end of the guide rail I3,and with itscontrolling arm M6 projecting through an opening 2' sufficiently largeto permit the angular movement of the arm and the viewing of the indiciawhich connote its position.

According to my invention the adjusting means for the shaving knife 38is so interrelated with the mandrel rotating or driving means that therendering of said latter means inoperative renders said adjusting meansineffective and causes the release of the knife 3? from the recordsurface. To this end I provide mechanisms connected to or associatedwith the arrn |26 and operatively movable therewith for effectingcontrol over the knife adjusting means, whichV means will now be fullydescribed.

The knife bar 3l is slidably mounted in opening 43 of the boss 32. Aguide rod 44S, located above and parallel to the knife bar 3i, extendsthrough and beyond the boss 32'; the rod also passes through a sleeveA5, secured in the upper end of said boss by a forced t therewith. Therod 44 has a reduced threaded upper end portion M" which extends`through the top wall 49 of the cap 41, and the rod is secured toE thecap by means of a cylindrical member 48 threaded onto the said endportion of the rod. The upper end portion of the sleeve provides ya seatfor the lower end of a coil spring 46 disposed about the rod 44, saidspring at'its opposite upper end abutting against the top Wall of thecap 41. The skirt of the cap 41 is of such length and design as to coverthe spring 46 in all positions of the knife bar 3| and move freely overthe boss 32. The upper end of the knife bar 3| extends through anaperture in the wall 49 and is surmounted by an enlarged head 5|! whichprevents the movement of the bar toward the record unless the cap 41 isalso moved in that direction. Since the coil spring 46 is biased, theprincipal functionof this spring is to return thecap 41 and thereby theknife bar 3| to inoperative position with the knife out of engagementwith the record cylinder when the knife barlocking mechanism(hereinafter described) is loosened. A collar 52 is adjustably mounted,by means of a set screw, upon the knife bar 3| at a point slightly abovethe upper end of the boss 32', said collar providing a seat for thelower vend of acompression spring 53 disposed about the bar 3| andhaving its upper end abuttingV against the top wall 49 of the cap 41.

The member 66, in addition to securing the guide rod 44-to the cap 41,also constitutes a nger piece or manipulative member whereby the knifebar 3| may be moved to bring the knife 36 to operative position. Whenthe parts are thus moved the engagement of the knife with the surface ofthe record will be cushioned by means of the spring 53, andproportionally, as will be understood, the depth of the engagement ofthe knife with the record will be determined by the amount of forceapplied to move the rod 44 down against its spring 46. To lock the knifein a set or operative position I may employ the construction about to bedescribed. v

The boss 32* is provided with a cylindrical openingl 55 extendingtransversely therethrough,

` through which the knife bar 3| extends.

the axis of said opening preferably intersecting the axis of knife bar3|, as clearly shown in Figure 5. Slidably disposed within the opening55 is a cylindrical vstud pin clamping member 56 having a cylindricaltransverse opening 51 Opening 51 is slightly larger than, or oversizedwith respect tothe knife bar so that when the two are concentricallypositioned the knife bar may slide freely through said opening. Theleft-'hand portion of member 56, as viewed in Figure 5, is reduced `andextends through a correspondingly reduced portion of opening 55 andoutwardly from the boss 32" a considerable distance. VVThe outer endportion of member 56 has a cylindrical headed nut 58 threaded thereon,the head 58 of the nut being adjacent vthe side of the mounting 32. Amanually operative lever 60 is provided at its lower end with two spacedflanges 6| and 6|' by means of which it is pivotally mounted on thereduced portion of the nut 58. A split collar 63 is firmly clamped onnut 58' between the flanges 6| and 6|' of the lever 66 by meansof ascrew 64 threadedV through opposed sections 65 and 66 of the collar. Thesection 66 has an extension arm 61 by which the collar 63 may beactuated in a counterclockwise direction as will be hereinafterdescribed. A torsio-n spring 68 furnishes a resilient connection betweenthe lever 66 and the collar 63 by having its intermediate portiondisposed or coiled around the head ofthe nut 58 and the ends thereofrespectively engaging the section 66 and the lever 60. By thisarrangement if the lever 60 is moved in the direction of the arrow B inFigure 2, movement in the same direction will be transmitted throughsaid spring to the collar 63 and nut 58.

To securely lock the knife bar 3| after it has been operativelypositioned, lever 66 is merely moved in the direction of the arrow B,which movement, as just described, effects( the turning of the nut 58 onthe reduced threaded portion of the member 56. In the turning of the nutthus effected, the head 58' thereof coacts with the side of the boss 32to move the member 56 longitudinally to the left (see Figure 5) in theopening 55 to a position in which the opening 51 in said member iseccentric to the knife bar 3|, and the wall of the opening 51 is forcedagainst the knife bar 3| so as to hold the latter in a set position,

the spring 68 being of suicient strength to f transmit the forcenecessary to thus effect the firm gripping of the knife bar by themember 56. It is'apparent that the maximum pressure with which member 56can be so engaged with the knife bar is determined by the strength ofthe spring 68. To prevent too great a movement of the lever 66 in aclockwise direction and thus impart an over pressure on the extensionarm 61 of the split collar 63 through the means of the spring 68, Iprovide the stationary pin or stop 69 on the side of the mounting 32.The movement of the lever 66 is thus limited to an extent of giving theproper pressure on the collar to clamp the knife bar 3|. Forautomatically releasing the knife bar, and thus release the knife fromitsengagement with the record, I employ the mechanism about to bedescribed.

Referring particularly to Figures 2 and 4, it will be seen there isprovided a bell-crank lever 16 pivotally mounted on a rear projection 32of the carriage 32 by means of a shoulder screw 1|. The upper arm 'i2 ofthe bell-crank extends beneath the arm 61 of the split collar 63, whilethe lower arm 13 thereof extends downwardly and inwardly, terminating ina laterally extending finger 14 adapted to overlie closely a` bar 15(see Figure 2). The bar 15 is adapted for parallel movement in avertical direction by virtue of its being supported at its ends by meansof parallel motion links 16 and 11. These links are adapted for pivotalmovement at their lower ends, by means of the shoulder screws 16 and 11threaded into the base plateV and at their upper ends by similar screwsthreaded in the Shanks of spacing rivets 16 and 1S securedto the bar 15,as may be best` seen in Figure l. To provide means for effecting themovement of the bar 15 the righthand'end thereof has a projection orplate 86 extending forwardly and downwardly to a position slightly belowthe plate l. Y

At the right-hand end of the plate l below the surface thereof, Iprovide supporting members 82 and 63, which are secured to said plate byscrews 32' and 63', respectively (see Figure 2). Journaled in saidsupports is a shaft 35, carrying at its forward end a crank member 86which projects, through a slot 81, outwardly and forwardly of thecabinet, and is adapted to engage, by means of a socket portion 83, theupper end of the switch arm |46. The socket portion 88 fits'fairlysnugly over the end of the arm 66, and affords a ready grip for anoperator to grasp and move it to cause the arm |116 to effect the On andOff positions of the switch |65. Secured to the shaft 85 as by means ofthe collar 85 is an upstanding arm 98,

which carries at its upper end a one-way pawl 92 pivoted on pin 9| andadapted to coact with the adjacent lower end of plate 80. The pawl 92 isnormally pivotally held in a given angular position by virtue of anangular lug 93 abutting against the arm 90, said lugk being retained insuch position by the tension of a pull spring 94 having one of its endsattached thereto and the other end secured to a lug 95 carried by saidarm (see Figures 2 and 4). The arm 9i) may be adjusted in angularposition on the shaft 85 by means of the set screw 90', the adjustmentbeing such that when the switch arm |46 is in the On position the noseor engaging end of the pawl 92 is a slight distance from the plate 8i),as seen in Figure 4. It is apparent, therefore, that if the switch armE46 is moved by means of the crank member 86 from the On position shownin Figure l to the Off position, the shaft 85 and arm 9! -will besimilarly rocked, thereby causing the pawl :'52 to travel in an arc fromthe position which it occupies in Figure Ll to the position wherein itis shown in dotted lines. Upon such movement it willY be obvious thatthenose of the pawl will shortly engage the adjacent plate 89 of the barI5 and move this latter sidewise and simultaneously upward due to thearrangement of supporting links TS and Ti. As a result of such upwardmovement of the bar l5, the bell-crank lever 'IB will be turned aboutits pivot 'H to cause its upper arm 'l2 to engage the extension B1 ofcollar 53, and thus release the knife bar 3l through the mechanismalready described. When the knife bar is thus released to disengage theknife, said bar moves upwardly under the tension of the spring 46 untilthe movement thereof is arrested by the adjustable collar 3 l secured tosaid bar at the front of the boss 32'. Also, to prevent angular movementof the bar within its opening 43, there is provided a small bracket 3lscrewed to the under side of the boss 32 and adapted to engage a groovein the bar as seen in the detailed View of Figure 5.

As stated, the finger 14 of the bell-crank 'l0 is always adapted tooverlie closely the edge of the bar 15, so that the upward movementthereof will "always rock said bell-crank to effect the release of theknife 3B at any point as it traverses the record. However, it may becomedesirable at times to cause the release of said knife to be effectedonly at a given point'in its longitudinal travel, such for instancejaswhen the knife has reached a position near the end of its travel, or isin a position past the extreme end of the cylinder. To provide for sucha contingency, I make the bell-crank 'l0 interchangeable with anothercrank l shown in Figure 6. The crank member Hl has all of the essentialsof the crank except that its lower arm 13' is shorter by an amountequivalent to the distance of the upward movement of the bar 15.Consequently, the finger 'M' will overlie the bar 15 at such a spaceddistance therefrom as not (in the absence of other means) to be affectedby the movement of said bar. Under such conditions, to eiect the releaseof the knife at a given point in its travel, I provide a sliding blockmember l 00 adapted to be set, as by means of the set screw IUI, at anydesired or predetermined point along the edge of the bar 15. Forinstance, if it is desired to release the knife at the terminal point ofits travel, said member may be set, as shown in Figure 6, near theextremity of said bar. If it is desired to release the knife at anyintermediate point in its travel, the member |00 may be advanced alongthe bar 15 to the selected point, as indicated by the dash and dotlines.

. While I have described a preferred embodiment of my invention it is tobe understood that the same is subject to changes and modificationswithout departure from the spirit of the invention or the scope of theappended claims.

What I claizn is:

1. In a record shaving machine, the combination with a rotatable supportfor a record to be shaved, of a motor for rotating said support, aswitch for controlling said motor, a record-engaging tool, means forlocking said tool in operative position with respect to the record, andmeans operative automatically as an incident to the stopping of themotor by the manipulation of said switch for releasing said tool.

2. In a record shaving machine, the combination of a mandrel forsupporting a record to be shaved, a record-engaging tool, means forsetting the tool in operative positionY with respect to the recordsupported by said mandrel, a motor for rotating said mandrel, aswitching mechanism for controlling said motor, and means cornprising apart of said switching mechanism for releasing the tool as an incidentto the stopping of the motor.

3. In a record shaving machine, the combination with a rotatable supportfor a record to be shaved, of a motor for rotating said support, a

switch for controlling said motor, a record-engaging tool, means forsetting said tool in operative position with respect to the record,means for effecting the release of said tool from operative position,and means common to said switch and said knife releasing means forstopping the motor and releasing said tool.

4. In a record shaving machine, the combination with a rotatable supportfor a record to be shaved and a carriage mounted for relative feedingmovement, of a record-engaging tool on said carriage, means for lockingsaid tool in operative position with respect to the record, a motor forrotating said support, a switch therefor, and means operableautomatically as an incident to the stopping of the motor by themanipulation of said switch for releasing said tool to inoperativeposition at any point of travel of the carriage.

5. In a record shaving machine, the combination with a rotatable mandrelfor supporting a record to be shaved and a carriage mounted for relativefeeding movement, of a record-engaging tool on said carriage,.means forsetting said tool in operative position with respect to the record, andmeans for effecting the release of said tool from operative position,said means comprising a switch mechanismadapted to control the ro tationof said mandrel and as an incident thereto effect the release of saidtool to an inoperative position. l

6. In a record shavingmaohine, the combination with a rotatable supportfor a record to be shaved, of a motor for rotating the support, a switchfor controlling said motor, a shaving knife, means for settingsaid'knife with respect to the record, and an actuating device foreffecting the release of said knife to an unset position, said devicebeing conditioned to function by the operation of said switch instarting said motor, and

caused to function by said switch as an incident cuit being opened andclosed by the operation of said switch to opening and closing positions,a shaving knife, means for setting said knife with respect to therecord, and an actuating device for effecting the release of said knife,said device being conditioned to function by the movement of said switchto a circuit closing position and caused to function by the movement ofsaid switch in opening said circuit.

8. In a record shaving machine, the combination with a rotatable mandrelfor supporting a record to be shaved and a carriage mounted for relativefeeding movement, of a record-engaging tool on said carriage, means forlocking said tool f in operative position with respect to the record,

a motor for rotating said mandrel, and a switch mechanism adapted tomake or break a circuit through said motor and as an incident to themanipulation of said switch mechanism substantially simultaneouslyeffect the release of said tool to inoperative position.

9. In a record shaving machine, the combination with a rotatable supportfor a record to be shaved and a carriage mounted for relative feedingmovement, of a record-engaging tool on sai-d carriage, means for lockingsaid tool in operative position with respect to the record, a motor forrotating said support, and a switch for the circuit of said motor, saidswitch when actuated to a circuit closing position starting the motorand resetting a control mechanism for releasing said locking means andAwhen actuated to an opened circuit position substantially simultaneouslystopping said motor and operating said control mechanism to effect therelease of said locking means.

10. In a record shaving machine, the combination with a rotatable recordsupport, of means for driving said support, means for controlling saiddriving means, a record-engageable tool, means for locking said tool inoperative position with respect to the record, means operable to effectthe release of said tool, and means whereby the operation of one of thesaid controlling and releasing means is effected as an incident to theoperationv of the other. Y

ll. In a record shaving machine, the combination with a rotatable recordsupport, of means for driving said support, means for controlling saiddriving means, a record-engageable tool, means for locking said tool inoperative position with respect to the record, and means operableautomatically as an incident to the operation of said controlling meansto effect the release of said tool.

l2. In a record shaving machine, the combination with a rotatable recordsupport, of means for rotating said support, means operable to effectthe stopping of said support, a record-engageable tool, means forlocking said tool in operative position with respect to the record,means operable to effect the release of said tool, and means whereby theoperation of one of the said stopping and releasing means is effected asan incident to the operation of the other.

13. In a record shaving machine, the combination with a rotatable recordsupport, of means for rotating said support, means operable to effectthe stopping of said support, a record-engageable tool, meansY forlocking said tool in operative position with respect to the record, andmeans operable automatically as an incident to the operation of saidstopping means to effect the release of said tool.

CHARLES HUENLICH.

CERTIFICATE OF CORRECTION.

Patent Nm, 2,095,55a, october'lz, 1957;

' CHARLES HUENLICH.

It isrhereby certified that error appears in the printedvspecifioationoi the above numbered patent requiring correction as follows: Page l,first column, line 25 for the word transverse" read traverse; line 55,for "frm" read from; andseoond column, line 1.1.5, for "falling readfailing; page 2v, first column, line h5, for "turn" vread true; and thatthe said Letters l Patent should be read with these corrections thereinthat the vsame may conform to the record of the loase 'in the PatentOffice..

Signed and sealed this 2lst`day v:of December, A. D. 1937.

, n Henry Van Arsdale, (Seal) lAoting Commissioner ofv Patents;

